21318970

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^2\times {\mathrm{1153}}^1$

素因数の和:1246

約数の個数: 24

約数和(自身を含む): 39321396

約数和(自身を除く): 18002426

約数列:

[1, 2, 5, 10, 43, 86, 215, 430, 1153, 1849, 2306, 3698, 5765, 9245, 11530, 18490, 49579, 99158, 247895, 495790, 2131897, 4263794, 10659485, 21318970]

約数ペア:

[(1, 21318970), (2, 10659485), (5, 4263794), (10, 2131897), (43, 495790), (86, 247895), (215, 99158), (430, 49579), (1153, 18490), (1849, 11530), (2306, 9245), (3698, 5765)]